Use-after-free in Linux kernel - CVE-2026-89899

Vulnerability identifier: #VU150392

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-89899

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to compromise confidentiality, integrity, and availability.

The vulnerability exists due to a use-after-free race condition in cec_transmit_msg_fh in the CEC subsystem when a blocking transmit wait is interrupted by a signal. A local user can interrupt a blocking transmit wait with a signal to compromise confidentiality, integrity, and availability.

Linux kernel
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
openSUSE Leap
openEuler
Ubuntu
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
kernel-livepatch-6_4_0-150600_23_138-default
kernel-livepatch-SLE15-SP6_Update_32-debugsource
kernel-livepatch-6_4_0-150600_23_138-default-debuginfo
kernel-livepatch-6_4_0-150700_7_78-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_78-rt
kernel-livepatch-SLE15-SP7-RT_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_84-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_22-debugsource
kernel-livepatch-6_4_0-150700_53_84-default
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
kernel-source
reiserfs-kmp-64kb
dtb-broadcom
dtb-freescale
dtb-nvidia
ocfs2-kmp-64kb-debuginfo
cluster-md-kmp-64kb-debuginfo
dtb-sprd
dtb-amd
dtb-rockchip
gfs2-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-exynos
dtb-hisilicon
kernel-64kb-debuginfo
dtb-renesas
kernel-64kb-devel
dtb-lg
dtb-marvell
dtb-xilinx
reiserfs-kmp-64kb-debuginfo
dtb-cavium
dtb-socionext
ocfs2-kmp-64kb
dtb-mediatek
dtb-amlogic
kselftests-kmp-64kb
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional
dtb-apple
dtb-altera
dtb-allwinner
dlm-kmp-64kb
kernel-kvmsmall-devel
kernel-debug-devel
kernel-kvmsmall-vdso
kernel-debug-vdso
kernel-default-vdso-debuginfo
kernel-default-vdso
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso-debuginfo
kernel-kvmsmall-debuginfo
kernel-debug-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-docs-html
kernel-source-vanilla
kernel-kvmsmall
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-default-optional
kernel-64kb-optional-debuginfo
dtb-apm
dtb-arm
dtb-amazon
kernel-64kb-debugsource
kselftests-kmp-default
kernel-default-optional-debuginfo
kernel-default-extra-debuginfo
dtb-qcom
kselftests-kmp-default-debuginfo
kernel-obs-qa
kernel-default-extra
dtb-aarch64
kernel-64kb
kernel-debug
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-64kb-devel-debuginfo
dlm-kmp-64kb-debuginfo
dlm-kmp-default
gfs2-kmp-default
kernel-default-devel
ocfs2-kmp-default
kernel-obs-build
kernel-default-devel-debuginfo
reiserfs-kmp-default-debuginfo
kernel-obs-build-debugsource
dlm-kmp-default-debuginfo
reiserfs-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default-debugsource
gfs2-kmp-default-debuginfo
kernel-syms
kernel-default
kernel-macros
kernel-docs
kernel-default-livepatch
kernel-default-livepatch-devel
cluster-md-kmp-64kb
cluster-md-kmp-default-debuginfo
kernel-64kb-extra
gfs2-kmp-64kb
kernel-default-base
kernel-default-base-rebuild
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
dlm-kmp-rt
cluster-md-kmp-rt
kernel-syms-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-debugsource
kernel-rt
kernel-azure-devel-debuginfo
kernel-azure-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-azure
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
kernel-livepatch-6_4_0-150600_23_138-default - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_32-debugsource - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_138-default-debuginfo - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150700_7_78-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_78-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_21-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_84-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_22-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_84-default - update to 1-150700.15.3.1
bpftool - update to 5.10.0-335.0.0.236
kernel - update to 5.10.0-335.0.0.236
python3-perf-debuginfo - update to 5.10.0-335.0.0.236
python3-perf - update to 5.10.0-335.0.0.236
perf - update to 5.10.0-335.0.0.236
bpftool-debuginfo - update to 5.10.0-335.0.0.236
kernel-debuginfo - update to 5.10.0-335.0.0.236
kernel-debugsource - update to 5.10.0-335.0.0.236
kernel-devel - update to 5.10.0-335.0.0.236
kernel-headers - update to 5.10.0-335.0.0.236
kernel-tools - update to 5.10.0-335.0.0.236
kernel-tools-debuginfo - update to 5.10.0-335.0.0.236
kernel-tools-devel - update to 5.10.0-335.0.0.236
perf-debuginfo - update to 5.10.0-335.0.0.236
kernel-source - update to 5.10.0-335.0.0.236
reiserfs-kmp-64kb - update to 6.4.0-150600.23.138.1
dtb-broadcom - update to 6.4.0-150600.23.138.1
dtb-freescale - update to 6.4.0-150600.23.138.1
dtb-nvidia - update to 6.4.0-150600.23.138.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dtb-sprd - update to 6.4.0-150600.23.138.1
dtb-amd - update to 6.4.0-150600.23.138.1
dtb-rockchip - update to 6.4.0-150600.23.138.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.138.1
dtb-exynos - update to 6.4.0-150600.23.138.1
dtb-hisilicon - update to 6.4.0-150600.23.138.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dtb-renesas - update to 6.4.0-150600.23.138.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dtb-lg - update to 6.4.0-150600.23.138.1
dtb-marvell - update to 6.4.0-150600.23.138.1
dtb-xilinx - update to 6.4.0-150600.23.138.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dtb-cavium - update to 6.4.0-150600.23.138.1
dtb-socionext - update to 6.4.0-150600.23.138.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.138.1
dtb-mediatek - update to 6.4.0-150600.23.138.1
dtb-amlogic - update to 6.4.0-150600.23.138.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.138.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
kernel-64kb-optional - update to 6.4.0-150600.23.138.1
dtb-apple - update to 6.4.0-150600.23.138.1
dtb-altera - update to 6.4.0-150600.23.138.1
dtb-allwinner - update to 6.4.0-150600.23.138.1
dlm-kmp-64kb - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.138.1
kernel-debug-devel - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.138.1
kernel-debug-vdso - update to 6.4.0-150600.23.138.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-default-vdso - update to 6.4.0-150600.23.138.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.138.1
kernel-docs-html - update to 6.4.0-150600.23.138.1
kernel-source-vanilla - update to 6.4.0-150600.23.138.1
kernel-kvmsmall - update to 6.4.0-150600.23.138.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-optional - update to 6.4.0-150600.23.138.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.138.1
dtb-apm - update to 6.4.0-150600.23.138.1
dtb-arm - update to 6.4.0-150600.23.138.1
dtb-amazon - update to 6.4.0-150600.23.138.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kselftests-kmp-default - update to 6.4.0-150600.23.138.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.138.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dtb-qcom - update to 6.4.0-150600.23.138.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.138.1
kernel-obs-qa - update to 6.4.0-150600.23.138.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dtb-aarch64 - update to 6.4.0-150600.23.138.1
kernel-64kb - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-debug - update to 6.4.0-150600.23.138.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug-debugsource - update to 6.4.0-150600.23.138.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dlm-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
gfs2-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-devel - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
ocfs2-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
dlm-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
cluster-md-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
ocfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-debugsource - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-syms - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-macros - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-devel - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-source - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-docs - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.138.1
cluster-md-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.84.1
kernel-64kb-extra - update to 6.4.0-150600.23.138.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.138.1
kernel-default-base - addressed in versions 6.4.0-150600.23.138.1.150600.12.64.1, 6.4.0-150700.53.84.1.150700.17.47.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.138.1.150600.12.64.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-devel - update to 6.4.0-150700.7.78.1
dlm-kmp-rt - update to 6.4.0-150700.7.78.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.78.1
kernel-syms-rt - update to 6.4.0-150700.7.78.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
gfs2-kmp-rt - update to 6.4.0-150700.7.78.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.78.1
kernel-source-rt - update to 6.4.0-150700.7.78.1
kernel-devel-rt - update to 6.4.0-150700.7.78.1
kernel-rt-debugsource - update to 6.4.0-150700.7.78.1
kernel-rt - update to 6.4.0-150700.7.78.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.84.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.84.1
kernel-azure-devel - update to 6.4.0-150700.53.84.1
kernel-azure-debugsource - update to 6.4.0-150700.53.84.1
kernel-azure - update to 6.4.0-150700.53.84.1
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/0fbd5c2327020858c45b2d1c65775d64cdeca523
• https://git.kernel.org/stable/c/9a951931d4b4084acd64fa55fc3672a9da45ddf9
• https://git.kernel.org/stable/c/9c6ceb0949227c1f0cf0e19393daec72d9889871
• https://git.kernel.org/stable/c/a3adb63b121937b97f7fdc51e96564c7c799538b

• Use-after-free in Linux kernel cec core driver
• openEuler 22.03 LTS SP4 update for kernel
• Debian update for linux
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more